GUI: Move buttons for the Grid Launcher below the grid area

This is more consistent with the layout of the List Launcher in
portrait mode and with the lowres layout which both have the
buttons at the bottom.

gui/themes/common/highres_layout.stx

@@ -325,7 +325,7 @@
 	</dialog>
 
 	<dialog name = 'LauncherGrid' overlays = 'screen'>
-		<layout type = 'vertical' align = 'center' padding = '23, 23, 8, 40'>
+		<layout type = 'vertical' align = 'center' padding = '23, 23, 8, 66'>
 			<widget name = 'Logo'
 					width = '287'
 					height = '80'
@@ -362,6 +362,9 @@
 						textalign = 'center'
 				/>
 			</layout>
+			<layout type = 'horizontal' padding = '0, 0, 2, 0' spacing = '2'>
+				<widget name = 'IconArea'/>
+			</layout>
 			<layout type = 'horizontal' padding = '0, 0, 2, 0' spacing = '2'>
 				<widget name = 'AddGameButton'
 						height = 'Globals.Button.Height'
@@ -382,9 +385,6 @@
 						height = 'Globals.Button.Height'
 				/>
 			</layout>
-			<layout type = 'horizontal' padding = '0, 0, 2, 0' spacing = '2'>
-				<widget name = 'IconArea'/>
-			</layout>
 			<layout type = 'horizontal' padding = '0, 0, 6, 0' spacing = '2'>
 				<widget name = 'ListSwitch'
 						height = 'Globals.Button.Height'